Currently 

// rdar://49864669
bool Quirks::shouldSuppressAutocorrectionAndAutocapitalizationInHiddenEditableAreas() const
{
    if (!needsQuirks())
        return false;

    return shouldSuppressAutocorrectionAndAutocapitalizationInHiddenEditableAreasForHost(m_document->topDocument().url().host());
}

 is calling 

// docs.google.com rdar://49864669
static bool shouldSuppressAutocorrectionAndAutocapitalizationInHiddenEditableAreasForHost(StringView host)
{
#if PLATFORM(IOS_FAMILY)
    return equalLettersIgnoringASCIICase(host, "docs.google.com"_s);
#else
    UNUSED_PARAM(host);
    return false;
#endif
}

Probably this should be only one function.